12x+7=4x+21

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Solution for 12x+7=4x+21 equation: 



12x+7=4x+21

We move all terms to the left:

12x+7-(4x+21)=0

We get rid of parentheses

12x-4x-21+7=0

We add all the numbers together, and all the variables

8x-14=0

We move all terms containing x to the left, all other terms to the right

8x=14

x=14/8

x=1+3/4

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